bader22 - Free Online Quiz Maker

Q1 Score: 2.04

a- dehydrated,carbon3.

b- Oxygenated,carbon2.

c- Oxygenated,carbon3.

d- Deoxygenate,carbon2

Q2 Score: 2.04

a- DNA ispolydeoxynucleotide

DNAexistsasadoublehelixoftwocomplementaryanti- parallel strands

c- Thymidylate is a distinctive component of D

DNAhas3'-endsononeside,&two5'-endsontheotherside.

Q3 Score: 2.04

1- The two nucleotide strands are held together by hydrogen

The number of thymidylate subunits should equal the number of deoxycytidylatesubunits

The number of deoxyadenylate subunits is essentially equal to the number of deoxyguanylate subunits

All the above is true.

Q4 Score: 2.04

a- A nitrogen base & ribose.

b- A nitrogen base , a pentose & phosphate.

c- A nitrogen base & phosphate

d- Any of the above

Q7 Score: 2.04

a- Hydrophobic interactions

b- Phosphodiester bond.

c- Vanderwaalsforce

d- Hydrogen bond.

Q9 Score: 2.04

a- Ribose

b- 2'-deoxyribose

c- 5'-deoxyribose

d- Any of the above.

Q10 Score: 2.04

a- 2'-hydroxylofonenucleotideto3'-hydroxylofthe ABCDE 1 2 3 4 5 6 Yourscore:.../6 6- following

b- 3'-hydroxylofonenucleotideto3'-hydroxylofthefollowing.

3'-hydroxyl of one nucleotide to 5'-hydroxyl of the following.

d- 5'-hydroxylofonenucleotideto5'-hydroxylofthe following.

Q11 Score: 2.04

a- Pyrimidine + pentose + phosphate.

b- Purine + pentose + phosphate.

c- Purine or pyrimidine + pentose.

d- Purine or pyrimidine + phosphate

Q13 Score: 2.04

a- A nucleoside

b- A nucleotide

c- A purine ring.

d- A pyrimidine ring

Q14 Score: 2.04

a- Appearanceofthemajor&minorgrooves.

b- Thickness of the helix

c- Polarity of the strands.

d- Numberofbasepairs/turn.

Q15 Score: 2.04

a- Deoxyuridylate

b- Deoxyguanylate

c- Deoxyadenylate

d- Deoxycytidylate

Q18 Score: 2.04

a- Atriple-strandstructure

b- TheDNAstrandsrunninginoppositedirections

c- BasepairingbetweenbasesA&G.

d- Covalent bonding between bases.

Q19 Score: 2.04

a- Adenine equals thymine

b- Adenine equalsuracil

c- Guanine equals adenine.

d- Cytosineequalsthymine

Q20 Score: 2.04

a- A=3100 , T=2600 , C=2600 , G=3100.

b- A=3000 , T=2200 , C=3400 , G=3200.

c- A=2600 , T=2600 , C=3300 , G=3300.

d- A=3300 , T=3300 , C=2600 , G=2600.

Q21 Score: 2.04

a- Cleavage of the phosphodiester bonds.

b- The formation of triple helix.

c- A decrease in light absorption at 260 nm.

d- Thedenaturatedtemperatureisdirectlyrelatedwiththeguanine & cytosine contents.

Q23 Score: 2.04

a- Phosphoric acid.

b- Pentoses

c- Adenosine

d- Cytosine

Q25 Score: 2.04

a- IsregulatoryrepeatingstructureofDNA&histonesproteins.

b- HasacoreofDNAwithproteinswrappedaroundtheoutside

c- Usesonlyonetypeofhistonespernucleosome

d- Is separated from a second nucleosome by non-histone protein.

Q27 Score: 2.04

a- Poly-nucleoside

b- Poly-nucleotide

c- Either (a) or (b).

d- Neither (a) nor. (b)

Q28 Score: 2.04

a- N-glycosidic linkage

b- Peptide bond

c- Phospho diester bond

d- Hydrogen bond.

Q29 Score: 2.04

a- Adenine & cytosine.

b- Guanine & thymine.

c- Adenine & guanine.

d- Thymine & uracil.

Q30 Score: 2.04

a- Hydrogenbond

b- Phosphodiester bonds.

c- Glycosidicbonds

d- all theabove

Q31 Score: 2.04

a- ContainscovalentlylinkedRNA&DNA.

b- ContainsacoreoftwoeachofhistonesH2A,H2B,H3&H4.

c- Requireaspecificbasesequenceforformation

d- ContainacoreoftwoeachofhistonesH1,H2,&H5.

Q32 Score: 2.04

a- ThehelicalstructureofDNAhasamajor(wide)groove&a minor (narrow)groove.

b- Regulatoryproteinsbindtothemajor&minorgrooves, regulating DNA & RNA synthesis.

c- Separation of the two DNA strands from each other occurs at high temperature & is called reannealing.

d- Themeltingtemperature(Tm)isthetemperatureatwhichhalf of the helical structure of DNA is lost.

Q33 Score: 2.04

a- DNAisdoublestrandedwhileRNAisabsolutelysingle stranded

b- DNAisresponsibleforstoringgeneticinformation&their transfer to daughter cells.

c- RNA is responsible for expressing the genetic information in the form of protein molecules.

d- DNAislocatedinthecellnuclei,whileRNAislocatedonlyin the cytoplasm

Q34 Score: 2.04

a- Thetwoendsarestructureequivalent

b- Themonomericunitsjoinedtogetherbyphosphodiester bonds

c- There are at least 20 different monomers that can be used.

d- Themonomericunitsarenotseparatedbyhydrolysis

Q35 Score: 2.04

a- Hasfewerbasepairs/turnthanBDNA helix.

b- Is permanent conformation of DNA.

c- HasahighcontentofCGsequence

d- Right handed double helix.

Q36 Score: 2.04

a- Adenine + guanine.

b- Cytosine+thymine.

c- Adenine +thymine.

d- Cytosine+guanine

Q37 Score: 2.04

a- A&TrichDNAdenaturesatalowertemperaturethanG&C rich DNA

b- Denaturationcausesanincreaseinabsorbanceat260nmofa DNA solution

c- Both (a) & (b).

d- Neither(a)nor(b).

Q38 Score: 2.04

a- DNAisfoundassociatedwithproteins,formingnucleoprotein.

b- The5'-endofonestrandofDNAisbase-pairedwiththe3'-end of the other strand.

c- Phosphodiester bonds are heat resistant , but can be cleaved by nuclease enzymes.

d- DenaturationofDNAresultsfromdisruptionofphosphodiester bonds

Q40 Score: 2.04

a- Theindividualstrandsarenothelical

b- Hydrogenbondsformbetweenpurine&pyrimidinebaseon the samestrand.

c- Adenine on one strand is hydrogen bonded to thymine on the opposite strand

d- Phosphodiesterbondsareorientedtowardtheinteriorofthe helix

Q41 Score: 2.04

a- histones Pts. (proteins)

b- non-histones Pts.

c- both a & b.

d- neither a nor b

Q42 Score: 2.04

a- Buildingunitsofnucleicacids

b- Sources of highenergy

c- Second messengers

d- Structuralcomponentsofmembranes

Q43 Score: 2.04

a- Deoxynucleic acid.

b- Deoxyribonucleic acid.

c- Deoxyribodeoxynucleic acid

d- Dioxyribonucleic acid

Q44 Score: 2.04

a- DNAisformedoftwobranchedpolydeoxyribonucleotide chains

b- DNAissynthesizedbypolymerizationofdeoxynucleotides

c- DNAispresentinthenucleusandthemitochondria

d- BacterialDNAispresentinthesinglechromosome&the plasmids.

Q45 Score: 2.04

a- A nucleoside phosphate

b- Ribose diphosphate

c- A nucleoside minus phosphate

d- A hydrolytic product of nucleosides

Q47 Score: 2.04

a- Deoxyguanylate&deoxycytidylateareattachedtoeachother by two hydrogen bonds.

Threehydrogenbondsexistbetweendeoxyadenylate

c- The A-T attraction is about 50% stronger than the C-G attraction

d- Noneoftheaboveistrue

Q49 Score: 2.04

a- 5'GTTCCCAA-3'.

b- 5'TTGGGAAC-3'.

c- 3'TTGGGAAC-5'.

d- 3'-GTTCCCAA-5'.